Tutorial by Examples: on

Debugging by raising exceptions is far easier than squinting through print log statements, and for most bugs, its generally much faster than opening up an irb debugger like pry or byebug. Those tools should not be your first step. Debugging Ruby/Rails Quickly: 1. Fast Method: Raise an Exceptio...

UIDevice *deviceInfo = [UIDevice currentDevice]; int d = deviceInfo.orientation; deviceInfo.orientation returns an UIDeviceOrientation value which is shown as below: UIDeviceOrientationUnknown 0 UIDeviceOrientationPortrait 1 UIDeviceOrientationPortraitUpsideDown 2 UIDeviceOrientationLandscap...

String to immutable ubyte[] string s = "unogatto"; immutable(ubyte[]) ustr = cast(immutable(ubyte)[])s; assert(typeof(ustr).stringof == "immutable(ubyte[])"); assert(ustr.length == 8); assert(ustr[0] == 0x75); //u assert(ustr[1] == 0x6e); //n assert(ustr[2] == 0x6f); //o...

The Google Analytics APIs allow you to access data within Google Analytics. It should not be confused with the measurement protocol which is used for inserting data into Google Analytics. The Google Analytics API is split into serval parts. Google Analytics Reporting APIs The Google Analytic...

Create a folder in your project folder, and add your fonts to it. Example: Example: Here we added a folder in root called "mystuff", then "fonts", and inside it we placed our fonts: Add the below code in package.json. { ... "rnpm":...

Inside a Project configuration, you can Create build configuration: Manually Provide a Name and a Description. The Build Configuration ID is generated from the ProjectName, and the Build Configuration Name's. Once your configuraion is Saved, you can specify a Version Control Settings. This will ...

Usually when generating random numbers it is useful to generate integers within a range, or a p value between 0.0 and 1.0. Whilst modulus operation can be used to reduce the seed to a low integer this uses the low bits, which often go through a short cycle, resulting in a slight skewing of distribut...

// Let's take an arbitrary piece of data, a 4-byte integer in this case let some_data: u32 = 14; // Create a constant raw pointer pointing to the data above let data_ptr: *const u32 = &some_data as *const u32; // Note: creating a raw pointer is totally safe but dereferencing a raw pointe...

Unlike normal Rust references, raw pointers are allowed to take null values. use std::ptr; // Create a const NULL pointer let null_ptr: *const u16 = ptr::null(); // Create a mutable NULL pointer let mut_null_ptr: *mut u16 = ptr::null_mut();

Overloading the addition operator (+) requires implement the std::ops::Add trait. From the documentation, the full definition of the trait is: pub trait Add<RHS = Self> { type Output; fn add(self, rhs: RHS) -> Self::Output; } How does it work? the trait is implemented for...

Detailed instructions on getting doxygen set up or installed.

Detailed instructions on getting pagination set up or installed.

Heap sort is a comparison based sorting technique on binary heap data structure. It is similar to selection sort in which we first find the maximum element and put it at the end of the data structure. Then repeat the same process for the remaining items. Pseudo code for Heap Sort: function heapsor...

Presumably the simplest way to use compose is with a View only. This allows you to include HTML templates without the need to declare a ViewModel with bindable properties for each of them, making it easier to reuse smaller pieces of HTML. The BindingContext (ViewModel) of the View will be set to th...

Note: at is not installed by default on most of modern distributions. To execute a job once at some other time than now, in this example 5pm, you can use echo "somecommand &" | at 5pm If you want to catch the output, you can do that in the usual way: echo "somecommand > o...

public class InsertionSort { public static void SortInsertion(int[] input, int n) { for (int i = 0; i < n; i++) { int x = input[i]; int j = i - 1; while (j >= 0 && input[j] > x) { input...

The following documentation describes both MySQLi and PDO supported pagination solution. Go to https://github.com/rajdeeppaul/Pagination and download pagination.php file into your project directory. Let's say your directory structure looks like this: project directory | |--paginati...

There are quite a number situations where one has huge amounts of data and using which he has to classify an object in to one of several known classes. Consider the following situations: Banking: When a bank receives a request from a customer for a bankcard, the bank has to decide whether to issue...

Let's say we have 8 houses. We want to setup telephone lines between these houses. The edge between the houses represent the cost of setting line between two houses. Our task is to set up lines in such a way that all the houses are connected and the cost of setting up the whole connection is mini...

Depending on your target machine, you need to choose a supported ROS Version (or vice-versa). Although ROS installation is well documented in the ROS wiki, It might be confusing to find them. So, here's a table of the ROS Version, target platforms & architecture and the links for the appropriate...